Uncommon Purpose interview questions

After I sent my resume, I was contacted by the company representative. I had the initial screening call with him. He described what subsidiary companies they were hiring for. I expressed my interest in Traction Rec so he forwarded my resume to the representative in that subsidiary company. This person asked me to do a coding test (at least of one of three pretty simple coding exercises). I submitted the test and didn't get any feedback for 2 weeks. I sent a follow-up email and it turned out that the representative of Traction Rec forgot about my test. He finally checked it, said it was great and invited me to an interview with him and the company CEO. This interview lasted an hour and included lots of theoretical questions about programming. The CEO and the other representative of the company talked a lot about how important transparency is at Traction Rec. However, they refused to give me the salary range. They told me that there would be three more stages following this interview (so 6 stages in total, including 3 coding tests). After that interview I never received any feedback or heard from them again.